Dayco 80270 Radiator Coolant Hose

Dayco 80270 Heater Hose Standard

Dayco 80270 is a standard radiator coolant hose for heater circuit service across a wide range of vehicles. It is listed for multiple OE-style heater hose locations, including inlet, outlet, pipe-to-reservoir, and straight applications on select Buick, Cadillac, Chevrolet, GMC, Nissan, Subaru, Toyota, and more.

Key Features

• Heater Hose Standard line for radiator coolant and heater system routing
• Direct-fit coverage for many OE hose locations, including inlet, outlet, and pipe-to-reservoir positions
• Application coverage for 1969-2018 vehicles across domestic and import platforms
• Cross-reference part numbers include ACDelco 30123 and Gates 28400
• Part number 80270 for catalog and fitment lookup

Detailed Description

Dayco 80270 is a radiator coolant hose used in heater and cooling system plumbing where a standard replacement hose is required. The Heater Hose Standard product line covers a broad mix of OE routing styles, including straight hose, 1/2 in. inside diameter applications, tee connections, and reservoir or cooler-to-pipe connections. This makes it a practical replacement for service work on vehicles such as the 2018 Buick Regal Sportback, 2014-2018 Cadillac CTS, 2018 Chevrolet Equinox, 2018 GMC Terrain, and 2005-2016 Nissan Frontier. It also covers older applications like the 1989-1997 Geo Metro, 1975-1980 Dodge D200, and 1969-1976 Chrysler Newport. This part cross-references ACDelco 30123 and Gates 28400 for the same application.

What It Helps Fix

• Coolant leaks at a worn heater hose connection
• Cracked or hardened hose material from age and heat cycling
• Restricted coolant flow through a damaged hose
• Incorrect hose routing after prior repair work
• Loss of heater performance caused by hose failure

Installation Notes and Tips

Verify the vehicle year, make, model, and hose position before ordering. Body fitment varies by application, so match the OE routing and note details such as inlet, outlet, pipe-to-reservoir, tee-to-pipe, or straight hose configuration. Confirm inside diameter and connection style on vehicles like the Subaru WRX STI, Nissan Maxima, and Toyota Sequoia before installation. Inspect adjoining clamps, pipes, and fittings for corrosion or wear before placing the new hose in service.

Quality Assurance

Dayco is a recognized name in belts and cooling components, and the 80270 heater hose is cataloged for broad OE-style replacement coverage across many vehicle platforms.